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JAMES T.. VSMITH AND JOHN WALTER, OF- BALTIMORE, MARYLAND.

' Leafs Patent No. 70,757, and November 12, 1867.

IMPROVRMEN T IN STEAM-GENERATORS.

TO ALL WIIOM IT MAY CONCERN: v

Beit known that we, JAMES T. SM'ITII and JOHN WALTER, of'Baltimore, in the county of Baltimore, and State ci' Maryland, have invented certain new and useful Improvements in Steam-Boilers; and we do hereby declare that the following is a full, clear,`and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. Inrthe annexed drawings, which make a part of this specification l Figure 1 represents an endvview of our boilers when in position.

Figure 2 is a side elevation of the same.

Figure 3 represents a vertical section of a single boiler cast with its water-pipe connection.

Our invention consists of a series of boilers, A, connected in the manner hereinafter described. Each boiler A,'in the outsideseries, will -be cast withwings b attached; the said wings being ve-eighths of an inch, vmore or less, in thickness. The wings In are cast with a hole through them to receive a rod or bolt, (see iig. 3;) the said hole being of suicient capacity to contain a quantity of water, which can pass from boiler A in wings bthrough an orifice marked t in fig. 3. When the whole series of boilers is united and arranged as seen in ig. 2, und the wings being made to't with a close j oint, a wall of iron will be thus interposed between the furnace and the wood-work of the boat or building inwhich our boilers may be used.

In order to join the several boilers in each vertical series, the two boiler-necks to be thus connected will have'thelir bore enlarged to the distance of several inches, having a square shoulder at bottom to receive a metal band, e, (see fig. 3;) onefhalf of said band entering the neck of each of the boilers, and forming a-watertght connection. E represents the mud or feed pipe, of which there are two, one supporting each of theoutside tier of boilers. The pipes E are tubular, with a flange at each end, and having a cap screwed on each Harige. On the outside of sills E, two tubes gare inserted; the bore of said tubes'commnnicating with the bore in sill E.

'Through one of these tubes the water is received to 'supply the boilers, the other is used for blowing out the.

boilers. Extending the whole length of sill E, and cast solid with it, is thel elevation F, which is made with a plane surface, with enlargements C at statedy distances apart. Into said enlargements the lower tier of boilers are made to iit. Through enlargements I(), which are tubular, the water is'. conveyed into the boilers A. H represents a pipe for containing water, and is connected with the upper tier of boilers by three or more short pipes. The ends of pipe H are secured by caps similar to those used for sill E.

It will be remarked that there are iive tier of boilers; the centre tier having only two boilers in each series, and the others three in each series. This number can be varied when required. On thetop of the centre tier yare placed the goose-neck branch pipes L, through which'the steam will ascend into a drum above, .and thence conveyed in the usual manner Ato the cylinder. As our boilers are all connected together, that is to. say, the boilers of each tier being connected by two pipes n n with the corresponding boilers in the tier next to it, the water must pass equally throughthe whole series. It will be seen also that the boilers are so arranged above the furnace that the heat can pass freely between the several tiers, and thus act at once upon the greatest`- possible surface, and generate steam'the more rapidly.

In order to clean out the boilers with the least possible labor, Iall the upper boilers have a cap, s, bolted on them at top; the said bolts extending down to the feed pipe. Ii'. The said caps can be easily taken off and any obstructions in the boilers removed. In addition to the cap s on the top of the outside tier of boilers, those on he three inner tiers are also furnished with similar caps at bottom, which can be easily removed, and the boilers thoroughly cleansed from end to end. l'lhat the volume of heated water may be as great as possible, tosupplyl the boilers, each boiler has two tubes m cast in connection with it, which said tubes communicate with the'boiler through the orice t, as seen in iig. 3. l vThrough these tubes m the bolts pass that conne the boilers together. The tubes m are jointed in a manner similar to the boilers, as already described; or, if preferred, the hole at the upper end of one tube fm may be ohamfered, and the adjoining tube bevelled to fit it.

The advantage we claim for our construction of boilers is thefacility with which they can be freed from incrustations, by having the bolts that unite the boilers together pass through thetub'es m, instead of Vthrough v the boilers themselves. We claim also that we provide 'a great safeguard against re by the use of wings b, whereby a continuous iron wall is formed between the furnace and the adjacent wood-work and coalfb'unks.

We are aware of the existence of the boiler patented by Joseph Harrison, Jr., August 8, 1865; We therefore disclaim all contained in said patent.

Haring thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. The interior series of boilers A, connected with tubes n, and supplied with caps s at each end, the whole constructed and operating substantially as set forth.

2. The mudsills E, pipes H, in combination' with the outside tier of boiler's A, operating as und for the purpose substantially as herein described.

8.' The goose-neel: branch pipes L, in combination with the central tier of boilers A, constructed as and for the purpose substantially as set forth.

In testimony that we claim the foregoing as our own, we have aflixed our signatures in presence of two witnesses.

JAS. T. SMITH, JOHN WALTER.

Witnesses:

WM. J. PARHAM', Remmen ROLAND. 

